2017 February

This version sleeps and wakes according to the realtime clock.
It's meant for a system without GPS access that operates with
a single funcube and no USB hub.

NOT FOR MOST USERS!

Notes:

1. You can click on the "Edit Deployment Plan" button to display an
   interface to allow editing of the frequency scanning schedule.

2. After making any changes, hit the "Save Changes" button.  You'll get
   a new pop-up window indicating success.

3. After changing the frequency scanning plan, you need to either:

   - reboot the SG

   or

   - unplug the funcubedongle; wait 20 seconds, replug the funcubedongle
   It might take another minute for the SG to recognize the replugged
   funcubedongle and restart its new scanning schedule.

4. Power consumption when off is approximately 0.75 Watts

5. Power consumption when listening on one funcube is approximately 2.8 Watts

6. Make sure you disconnect your laptop from the SG *before* it starts
   a scheduled sleep.  Disconnecting the USB cable from the SG
   *afterwards* (i.e. during a scheduled sleep) causes the SG to awken
   immediately.  Subsequent behaviour has not received much testing...

7. This version depends on the GPS realtime clock to get a correct date / time
   upon rebooting.   We recommend:

    - put a new CR-1220 watch battery in the GPS cape

    - power up the SG outdoors, so that the GPS has a clear view of the sky, either
      with the cover off, or with an external antenna attached to the gold
      SMA coaxial terminal on the beaglebone case.  This step sets the GPS's
      realtime clock, so that on subsequent reboots, the beaglebone will be
      able to get the correct date/time from the GPS's clock, even when no
      GPS satellites are in view (e.g. in a cave).